<HTML><HEAD><TITLE>ord_proper_subset(+Set1, +Set2)</TITLE>
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<H1>ord_proper_subset(+Set1, +Set2)</H1>
Checks whether Set1 is a proper subset of Set2
<DL>
<DT><EM>Set1</EM></DT>
<DD>A set
</DD>
<DT><EM>Set2</EM></DT>
<DD>A set
</DD>
</DL>
<H2>Description</H2>
	Succeeds when every element of the ordered set Set1 appears
	in the ordered set Set2, and Set2 has at least on element that
	does not occur in Set1.
    
<H3>Modes and Determinism</H3><UL>
<LI>ord_proper_subset(+, +) is semidet
</UL>
<H2>See Also</H2>
<A HREF="../../lib/ordset/ord_subset-2.html">ord_subset / 2</A>, <A HREF="../../lib/ordset/ord_compare-3.html">ord_compare / 3</A>
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